<template>
  <div class="icons">
    <swiper :options="swiperOption" v-if="showIcons">
      <swiper-slide v-for="(page,index) of pages" :key="index" >
        <div 
          class="icon"
          v-for="item of page"
          :key="item.id">
          <div class="icon-img">
            <img 
              class="icon-img-content" 
              :src='item.imgUrl' />
          </div>
          <p class="icon-desc">{{item.desc}}</p>
        </div>
      </swiper-slide>
      <div class="swiper-pagination"  slot="pagination"></div>
    </swiper>
  </div>
</template>
<script>
export default {
  name: "HomeIcons",
  props:{
    list: Array
  },
  data(){
    return {
      swiperOption: {
          // some swiper options/callbacks
          // 所有的参数同 swiper 官方 api 参数
          // ...
          pagination: '.swiper-pagination',
          loop: true,
          autoplay: false
        }
    }    
  },
  computed: {
    pages () {
      const pages = []
      this.list.forEach((item, index)=>{
        const page = Math.floor(index / 8)
        if(!pages[page]){
          pages[page] = []
        }
        pages[page].push(item)
      })
      return pages
    },
    showIcons () {
      return this.list.length
    }
  }
}
</script>
<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  @import '~styles/mixins.styl'
  .icons >>> .swiper-container
    overflow: hidden
    height: 3rem
    // padding-bottom: 50%
    padding-top 0.1rem
    // background: green  
  .icons >>> .swiper-pagination-bullets
    bottom 0  
  .icon
    position relative
    overflow hidden
    float: left 
    width: 25%
    height 1.5rem
    // padding-bottom: 25%
    // background: red
    .icon-img
      position absolute
      width 100%
      top 0
      left 0
      rignt 0
      bottom .44rem
      // box-sizing border-box
      // padding .1rem
      // background blue
      .icon-img-content
        display block
        margin 0 auto
        height 100%
    .icon-desc
      position absolute
      left 0
      rignt 0
      bottom 0
      height .44rem
      width 100%
      line-height .44rem
      text-align center
      ellipsis()
</style>
